Patent US3522509A successfully refreshed from Google Patents.
US3522509A
Expired / Lapsed
US
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Floating power supply
Assignee: Scientific Data Systems Inc
•
Filing: 1968-10-30
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Granted: 1970-08-04
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Expires: 1988-10-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph D Hasenbalg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:53
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/10; H02M5/16; H01; H01F; H01F27/00; H01F27/40; H01F38/00; H01F38/14; Y; Y10; Y10S; Y10S336/00; Y10S336/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2837651A
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US2895059A
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US2948871A
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US3009115A
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US3277358A
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US3292579A
Cited
US3465232A
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US3435320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |